UNIX for Advanced & Expert Users

Hi,

I have a postfix server that relays to an exchange server. All of my unix/linux systems send to this server, the problem is the form the mail is sent with,

the sender address is

Code:

username@hostname.domain.local

I need to rewrite every sender address to

unix@maildomain.com

for this I added the following entry to main.cf:

Code:

sender_canonical_maps = hash:/etc/postfix/canonical

/etc/postfix/canonical:

Code:

/domain.local/ unix@maildomain.com

I ran the postmap command and restarted the mailserver

but it's not working, any idea?


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Edit: ok found the solution

in main.cf

Code:

sender_canonical_maps = regexp:/etc/postfix/canonical

instead of hash, works now

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Edit2: but just works for localhost, and not for relay hosts
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Edit3:

needed to append the line

Code:

local_header_rewrite_clients = static:all

to main.cf


hurray!!
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Edit4:

hm now I need a solution, that writes the original hostname to the subject, because now I can't determine the sender host
of course it can be added to the specific mail script, but we have about 300 mailscripts
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Edit5:

have the solution, regular expressions and header_checks, details tomorrow

..
to main.cf:

Code:

header_checks = regexp:/etc/postfix/header_checks

to /etc/postfix/header_checks:

Code:

/From:.* <.*@(.*)\.domain.local>/ REPLACE From: $1 <unix@maildomain.com>

this will not write the hostname to the subject, it writes it to the from field, looks like

Code:

From: hostname <unix@maildomain.com>

outlook displays this name in the from column, which is absolutely perfect for my needs